<!doctype html>
<head>
  <link rel="stylesheet" type="text/css" href="./index.css"></link>
</head>
<body>
  <audio controls id="audio1">
      <source src="b.mp3" type="audio/mpeg">
      您的浏览器不支持 audio 元素。
  </audio>
  <canvas id="canvas1"></canvas>
  <canvas id="plot"></canvas>
  <!-- <input id="files" type="file"> -->
  <div id="controls">
    <button id="play">播放</button>
    <button id="pause">暂停</button>
    <button id="replay">重新开始</button>
    <input id="timeline" value="0" type="range" min="0" />
  </div>

  <script src="./controls.js"></script>
  <script src="./draw.js"></script>
  <script src="./index.js"></script>
</body>